Sofa



FIG. 1 is a front elevation view of the sofa showing my new design.

FIG. 2 is a back elevation view thereof;

FIG. 3 is a side elevation view thereof; and,

FIG. 4 is an opposite side elevation view thereof.

The dashed lines are presented to represent stitching lines. 

The ornamental design for the sofa, as shown and described. 